The technical feasibility of a sequential batch process for the biological treatment of sediments contaminated by polycyclic aromatic hydrocarbons (PAHs) was evaluated through an experimental study. A bench-scale Sediment Slurry Sequencing Batch Reactor (SS-SBR) was fed with river sediments contaminated by a PAH mixture made by fluorene, anthracene, pyrene and crysene. The process performance was evaluated under different operating conditions, obtained by modifying the influent organic load, the feed composition and the hydraulic residence time. Measurements of the Oxygen Uptake Rates (OURs) provided useful insights on the biological kinetics occurring in the SS-SBR, suggesting the minimum applied cycle time-length of 7 days could be eventually halved, as also confirmed by the trend observed in the volatile solid and total organic carbon data. The removal efficiencies gradually improved during the SS-SBR operation, achieving at the end of the study rather constant removal rates above 80% for both 3-rings PAHs (fluorene and anthracene) and 4-ring PAHs (pyrene and crysene) for an inlet total PAH concentration of 70 mg/kg as dry weight (dw).

Chiavola, A., Baciocchi, R., & Gavasci, R. (2010). Biological treatment of PAH-contaminated sediments in a sequencing batch reactor. JOURNAL OF HAZARDOUS MATERIALS, 184, 97-104 [10.1016/j.jhazmat.2010.08.010].

Biological treatment of PAH-contaminated sediments in a sequencing batch reactor

BACIOCCHI, RENATO;GAVASCI, RENATO
2010

Abstract

The technical feasibility of a sequential batch process for the biological treatment of sediments contaminated by polycyclic aromatic hydrocarbons (PAHs) was evaluated through an experimental study. A bench-scale Sediment Slurry Sequencing Batch Reactor (SS-SBR) was fed with river sediments contaminated by a PAH mixture made by fluorene, anthracene, pyrene and crysene. The process performance was evaluated under different operating conditions, obtained by modifying the influent organic load, the feed composition and the hydraulic residence time. Measurements of the Oxygen Uptake Rates (OURs) provided useful insights on the biological kinetics occurring in the SS-SBR, suggesting the minimum applied cycle time-length of 7 days could be eventually halved, as also confirmed by the trend observed in the volatile solid and total organic carbon data. The removal efficiencies gradually improved during the SS-SBR operation, achieving at the end of the study rather constant removal rates above 80% for both 3-rings PAHs (fluorene and anthracene) and 4-ring PAHs (pyrene and crysene) for an inlet total PAH concentration of 70 mg/kg as dry weight (dw).
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore ICAR/03 - Ingegneria Sanitaria-Ambientale
English
Con Impact Factor ISI
Oxygen uptake rate; polycyclic aromatic; hydrocarbons (PAHs); sequencing Batch; reactor; sediments; slurry
Chiavola, A., Baciocchi, R., & Gavasci, R. (2010). Biological treatment of PAH-contaminated sediments in a sequencing batch reactor. JOURNAL OF HAZARDOUS MATERIALS, 184, 97-104 [10.1016/j.jhazmat.2010.08.010].
Chiavola, A; Baciocchi, R; Gavasci, R
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
DEFINITIVO.pdf

accesso aperto

Dimensione 1.17 MB
Formato Adobe PDF
1.17 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/12289
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 19
social impact